function getCookie(c_name) {
	if (document.cookie.length > 0) {
		c_start = document.cookie.indexOf(c_name + "=")
		if (c_start != -1) {
			c_start = c_start + c_name.length + 1
			c_end = document.cookie.indexOf(";", c_start)
			if (c_end == -1)
				c_end = document.cookie.length
			return unescape(document.cookie.substring(c_start, c_end))
		}
	}
	return "";
}
function setCookie(c_name, value, expiredays) {
	var exdate = new Date()
	exdate.setDate(exdate.getDate() + expiredays)
	document.cookie = c_name + "=" + escape(value)
			+ ((expiredays == null) ? "" : ";expires=" + exdate.toGMTString())
}